When Worf stabs Kurn, Odo says that he had better hope that Kurn doesn't die because then Worf will be charged with murder. As it happens Kurn lives, so everything is okay. So... there's no such thing as attempted murder on DS9? Stabbing somebody in the heart doesn't even rate an assault charge?

At one point, Kurn breaks down and cries in misery. But according to Spock in Star Trek VI, Klingons have no tear ducts and cannot cry.

Plotline

Worf faces some difficult decisions when his brother Kurn arrives on Deep Space Nine, honourless and determned to die.